https://www.amazon.com/Gasoline-Tran...0096702&sr=8-4
Or you can put one together from parts from your local auto parts store. You just need an in line fuel pump, a switch, hoses and wire. I put one together for my mom, works ok, not the fastest way but better than trying to balance or hang a can of fuel.
Here's a pump you can build on.
http://www.autozone.com/fuel-systems...ump/562449_0_0